12157613 has 4 divisors (see below), whose sum is σ = 13092828. Its totient is φ = 11222400.

The previous prime is 12157597. The next prime is 12157627. The reversal of 12157613 is 31675121.

12157613 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31675121 = 67 ⋅472763.

It can be written as a sum of positive squares in 2 ways, for example, as 3378244 + 8779369 = 1838^2 + 2963^2 .

It is a cyclic number.

It is not a de Polignac number, because 12157613 - 2⁴ = 12157597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12157633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 467588 + ... + 467613.

It is an arithmetic number, because the mean of its divisors is an integer number (3273207).

Almost surely, 2^12157613 is an apocalyptic number.

12157613 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

12157613 is a deficient number, since it is larger than the sum of its proper divisors (935215).

12157613 is an equidigital number, since it uses as much as digits as its factorization.

12157613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 935214.

The product of its digits is 1260, while the sum is 26.

The square root of 12157613 is about 3486.7768784366. The cubic root of 12157613 is about 229.9408354436.

The spelling of 12157613 in words is "twelve million, one hundred fifty-seven thousand, six hundred thirteen".